88 



49. Cathartes aura septentrionalis. Turkey Vulture. — 



Common. Our attention was frequently attracted to 

 them by the rushing sound of their wings as they 

 swooped through the still desert air. The exposed 

 sandbars of the delta seemed to be favorite resting 

 places, bands of the birds standing in rows and sunning 

 themselves in such situations. 



On April 13, Mr. Rockwell wounded an antelope 

 doe which escaped over rocky ground; leaving no trail 

 either of hoof mark or blood. On the following day he 

 discovered the body of the animal, but the Turkey 

 Vultures had destroyed it. 



50. Elanus leucurus. White-tailed Kite. — Seen twice 



along the Hardy by Rhoads. 

 51- Circus hudsonius. Marsh Hawk. — '^Frequent'^ 

 (Rhoads). 



52. Accipiter velox. Sharp-shinned Hawk. — ''Rarely 



seen" by Rhoads, who shot one specimen on the 

 Colorado River. 



53. Accipiter cooperi. Cooper's Hawk. — ''Several noted'' 



(Rhoads) . This species breeds in the timbered bottom- 

 lands of the Colorado Valley {cj. Grinnell, 124). 



54. Parabuteo unicinctus harrisi. Harris's Hawk. — Noted 



several times on the western slopes of Pattie Basin, 

 usually seated upon some low perch. On April 8 I 

 rode my horse within a few yards of one as it sat 

 unconcernedly on a creosote bush not more than three 

 feet above the ground. 



Rhoads found this hawk numerous. 



55. Buteo borealis calurus. Western Red-tail. — "Abun- 



dant" (Rhoads). 



56. Buteo lineatus elegans. Red-bellied Hawk. — "Sev- 



eral" (Rhoads). 



57. Buteo swainsoni. Swainson's Hawk. — "Several" 



(Rhoads). 



58. Buteo platypterus. Broad-winged Hawk. — "Two or 



three seen" (Rhoads). 



59. Aquila chrysaetos. Golden Eagle. — "At Mount Ma- 



jor" (Rhoads). 



